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#Question id: 3766


Individuals with the disorder xeroderma pigmentosum are hypersensitive to sunlight, and mutations to the DNA in their skin cells are left uncorrected. Why are the mutations not corrected in individuals with this disorder?

#Section 3: Genetics, Cellular and Molecular Biology
  1. The disorder makes cells unable to replicate DNA.

  2. The disorder causes mitosis to stop during metaphase.

  3. The disorder makes cells unable to form chromosomes.

  4. The disorder causes cells to be unable to repair thymine dimers.

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TLS Online TPP Program

#Question id: 4418

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Histones in repressed regions near telomeres and at the silent mating loci are hypoacetylated, confirmed by using

TLS Online TPP Program

#Question id: 4554

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

In which studies have shown that phosphorylated NtrC bound at enhancers and σ54-polymerase bound at the promoter interact directly, forming a loop in the DNA between the binding sites?

TLS Online TPP Program

#Question id: 4718

#Section 3: Genetics, Cellular and Molecular Biology

All the following statements about destruction of cyclins are true, except:

TLS Online TPP Program

#Question id: 4727

#Section 3: Genetics, Cellular and Molecular Biology

if mendal had studied the seven trait using a plant with 12 chromosome instead of 14, in what manner would his interpretation have been different ?

TLS Online TPP Program

#Question id: 4728

#Section 3: Genetics, Cellular and Molecular Biology

The genotype r/r ; p/p gives fowl a single comb, R/– ; P/– gives a walnut comb, r/r ; P/– gives a pea comb, and R/– ; p/p gives a rose comb. Which of the following parental genotype would produce 3/8 Walnut comb, 1/8 pea comb, 3/8 rose comb and, 1/8 single comb?

TLS Online TPP Program

#Question id: 4729

#Section 3: Genetics, Cellular and Molecular Biology

In the following example, 3 independently assorting genes A, B and C are known to govern coat color in mice. Homozygous recessive cc (albino phenotype) is epistatic over both gene A and B, What will be the expected frequency of non albino, in the progeny from cross of AaBbCc with genotype of AABbCc?